Tire-pump.



'I'. K. BEGG & A. H.'MO0RE.

TIRE PUMP.

APPLIOATION FILED JUNE 25, 1910.

Patented July 22, 1913.

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ATTORNEYS,

T. K. BEGG @n A. H. MOORE.

TIRE PUMP.

APPLICATION FILED JUNI: z5', 1910.

Patented July 22, 1913,

2 SHEETS-SHEET 2.

WITNESSES: J'. Sefwcw/ 'noemen TED ,gratins PATENT onnrCE "THOMAS n. BEGG AND RTHUR H. Moomior BRIDGEPCRT, CONNECTICUT, AssieN j ons .'ro `'ma BRIDGE-roer BRASS COMPANY, 'orrnrnenronn CONNECTICUT, A

` CORPORATION' OF CONNECTICUT.

specification olf-Letters Patent.

TIRE-PUMP.

Patented July 22, 1913.

Application filed .Tune 25, `191). Serial No. 568,911.

To' aZZ-wzom'z't may concern.'

' Be it known that we, THOMAS K. Broc' fand ARTHUR, H.- Moon-E, of the city of Bridgeport, county. of Fairfield, and State of Connecticut, have invented new and useul Improvements 1n Tire-Pumps, of which the -following isa full, clear, and exact de scription, when'taken in connection with the accompanying drawings, which form a part thereof. This invention 4relates to pumps fol' pumping air into pneumatic tires by hand u orotherwise, andmore particularly to that type of pump known as the double acting pump in which two parallel cylinders of ditterent sizes are arranged side by side, the pistons of which are connected together to Work inunison while their etfectivestrokes take place'in opposite directions.

Aduction otlasimple and eitioient pump of The invention has for its object the prothis character which may be readily separated for the purpose of cleaning, inspection, etc., and readily assembled. To this'k -end the vpump has two cylinders 'which ter- F urthermore,- the invention relates to the novel means for closing'the cylinders and such other improvements and combinations of parts' as are hereinafter set forth and claimed.`

-Referring to the drawings, Figure l represents a vertical central section through a pump embodying the invention, Fig. 2, an elevationof the same, Fig, 3, a detailed sectional view through/the open upper ends of the cylinders when the pistons are being assembled,and Fig. 4, a similar' view with thev pistons shown in a different position.

ln ,all figures, similar letters of reference represent like parts.

In the drawings', the letter-A designates the yone-'of two parallel disposed cylinders, which is larger in diameter, and B designates kthe one smaller in diameter. The cyl-- inders A and Bfare mounted on a lease'C, provided with laterally projecting wings or extensions D for the foot or feet of the operator. `The base C is provided with two recesses E and `F having a'communicatlng i vent G. Into the recess F the lower end ot' slight taper, so thatl as the end of the cylinder is forced downward the cup or ring will enter it and crowd the lower end outward into the internal screw threading of the recess, thus producing an air tight joint. The larger recess E is provided with a shoulder or seat H, on which is adapted to rest a. centrally perforated washer I, and on' the washer I rests the lower end of the larger cylinder A, which is provided with an outwardly projecting annulartlange J, adapted to rest on the washer l. The recess E is interhallyl threaded for the reception of a thimble or nut L adapted to be screwed down into'the recess and bind the outwardly turned flange J of the cylinder A tightly on the washer I upon the shoulder H. The upper ends of the cylinders A and B terminate on different horizontal or transverse planes. As more particularly shown in Fig. 4, the small cylinder B terminates at its upper end considerably below the upper end of thelarge cylinder' A, and both cylinders-are adapted tol take into a collar M. The small cylinder is provided witlran outwardly turned flange N, which is /adapted to rest on a washer N on an internal shoulder or seat O in the. collar M, and be held 4lar M to bind the flange N against the washer on the shoulder O. A cap Q is adapted to be screwed in the upper end of the collanM against a washer Q', and has a central perforation, Q2. A centrally perforated plug S surrounds the piston rod R, and screws into the cap Q. A leather packing S is adapted to rest on a shoulder or seat S2 in the cap Q, and is held in place by the plug S as it is screwed downin the cap, thereby making an air tight ]oint -between theplug and cap, and as the packing fits snugly around the piston rod R, it prevents the escape of air through the cap and plug around the piston rod. Theunscrewing of the cap. permits the removal of the piston rod from the 'cylinder'. `The larger..

cylinder )i is closed at its upper end by a cap T provided with internal threading adapted to enga-ge external threading in the end of the cylinder. The cap T is provided with a central perforation for the piston rodi? of the large cylinder, .and tlie center of the cap is prolonged, as shown at.

derbeing so constructed as tohave its e-.

fectiye stroke when it is -being raised. .By this construction upon the downward stroke of the two piston rods, which are operated Simultaneously by means ofl` a handle X, to which both are secured, the piston Vof the large cylinder will force the air downward through the vent G armind the piston W into the smallcylinder B. The upward stroke .allows fresh air to pass around the piston ,V in the cylinder A, while the piston V'will force the air in the'cylinder B up ward and out of a suitable outlet Y-of any desired' construction through a valve (not shown) into the pipe Z. The piston V is provided with ya washer V to protect it trom contactvwith the cap T, at the upper end oi the'strolieof the piston and to sup-f port it. By thisl construction each'Y cylinder is provided with an effective airtight joint at that end of thecylinder toward which` each piston -travels during its eiiective stroke. y

Torem'ove the buckets from the cylinders for any purpose, such as to clean or inspecte the'interior, of the cylinders, it is only necessary' to unscrew the cap N from the top of the cylinder A and the cap 'Q :from the collar M, whereupon the 'two piston rods and pistons may'be 'readily removed.

To reassemble the parts, the piston Y of the large cylinder is inserted iirstVV into the end of the largeicylinder at an angle, as shown more particularly in Fig. t, because the piston or bucket is normally somewhat wider. than the diameter of 4the cylinder,

and is liable to spread unless the piston is thus rocked or inserted at an angle. The piston rod is then turned to a position substantially parallel. with the axis of the cyIinder,-when it will assume the position shown in Fig. 3 in which the piston of thev large cylinder has been inserted in the cylin-4 der, whilethe piston lV of .the small cylin` derl is stillwithout its corresponding cylinder, but in alinement therewith, after which it is merely necessary topush 'downward the handle X. when'the .pist-on. W ofthe small cylinder' B will atonce` passv into the interior of its cylinder. This visa peculiarly eiiicient and facilemethod for assembling the pistons within the cylinders. because it the two cylinders were o'E the saine height it would be necessary to see that both pistons enteredN the cylinders simultaneously, which would not permit the rocking or slanting of the piston ot the large cylinder, as above described. in the present construction the larger piston is inserted andthe rod brought to a proper axial alinenient with the large cylinder before the piston of tlie' small cylinder is ready-to enter its cylinder, because the larger cylinder extends up above'theplane of the top of the small cylinder.

Having now described lour invention, what .we claim and desire to secure by Letters Patent, is

l.. In a pump,` the combination of a base, parallel cylinders mounted on and rising from said base and having their upper ends located in different horizontal planes, pisto-ns for said cylinders` having a common operating device, a collar in which the upperends of both cylinders are secured,a eap'directly engaging and closing 'the cylinder having the higher upper end, and a cap directly engaging said collar and closing the upper end of the other cylinder; substantially as described. Y

2. In a pump, the combination of abase, a collar..a cylinder fixed to said base. and having its upper end extending through and upward beyond said collar, a second cylinder fixed to'said base alongside the first and having its upper end disposed withinfsaid collar below the upper surface of the latter, a cap directly engaging and closingthe upper end of the first 'named cylinder, a cap directly engaging said collar and closing the upper end of tli'e last named cylincylinders otditferent diameters rising from said base and arranged with the upper end of the larger cylinder extending above the upper end of the smaller cylinder, a` collar in which, the ends of both cylinders are secured, a cap directly enga-ging the upper' end of the larger cylinder to close-the same, a cap engaging said collar and closing they upper end of th^ smaller cylinder, and connected fpistons for Asaid cylinders, the piston of thelargercylinder having its operative stroke downward, and the piston of the smaller cylinder havinglits operative stroke upward; substantially as described.

4. In a pump, 'the combination of a base having 'a bore or socket at the upper face thereoi, said bore or socket haring a thread- -ed side wall and zi-closed bottom presenting 'a seat. an annular sleeve-like 'member 'resting 4 at its lower edge on said seat the upper edge of said member being turned in to iemforce said nx'ember and present a slight taper at the outer surface thereof, and a cylinder having its lower end provided with exterior screw threads engaging those of the socket wall,a and having its inner surface engaged by the outer surface of said annular member, the latter being of such a diameter as to closely fit the inner surface of the lower end of the cylinder and be v10 compressed thereby .to provide a tight closure for the end of the cylinder; suhstantially as descrbed.

In wtnws whexzeo'f, we have hereunto set our hands on the (3th day of June, 1910.

THOMAS K. KEGG. ARTHR H. MOORE.

Witnesses C. A. BALDWIN A. B. LYFORD. 

